Cube of a number ending in 9 will always end with 9.

True

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False

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Solution

The correct option is A
True

Cube of a number ending in 9 will always end with 9. For example, cube of 9 = 729. Hence the statement is correct.

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A number ending with 1 or 9 will always have its square ending with 1.

Square of a number ending with 1 or 9 will always have unit digit as 1.

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(viii) If $a^{2}$ ends in 9 then $a^{3}$ ends in 7.
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If square of x end in 9 then which digit does cube of x ends in

Q. If

a^{2}

ends in

9,

then

a^{3}

will end in:

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Cube of a number ending in 9 will always end with 9.

The correct option is A True Cube of a number ending in 9 will always end with 9. For example, cube of 9 = 729. Hence the statement is correct.

The correct option is A
True

Cube of a number ending in 9 will always end with 9. For example, cube of 9 = 729. Hence the statement is correct.